For the occasion, the duchess went with a sophisticated yet sexy style. Her black double-breasted dress had a plunging neckline balanced out by long sleeves. The $600 Judith and Charles frock also had a shorter-than-normal hemline for the duchess, revealing a lot of leg, which was accentuated by Stuart Weitzman black suede pumps. And the shine on her gams says she wasn’t wearing pantyhose.

With a snug fit, the look was slightly sexy but also subdued, thanks to a lack of jewelry and a simple gold box clutch.

It’s about time the girl got to wear a tuxedo. In July, a rumor spread that the Duchess of Sussex really wanted to wear a tuxedo during her first royal tour in Australia but that Prince Harry nixed the idea.

Princess Diana in a tuxedo at Wembley Stadium in 1988. (Photo: Shutterstock)

Even her late mother-in-law, Princess Diana, rocked tuxedos and skirt suits a time or two, including a Margaret Howell tuxedo in 1984 and a Catherine Walker pink and purple tuxedo-style skirt suit in 1990.